Washer-scratching machine



Apaifl 2,3929, w. A. BOHNE WASHER SCRATCHING MACHINE 5 Sheets-Sheet 1 Filed Nov. 5, 1927 Aprifl 2, 1929. w A BOHNE mwww WASHER SCRATCHING MACHINE Filed Nov. 5, 1927 5 Sheets-Sheet 5 I .[Zw 67:50 r-x- Patented Apr. 2, 1929.

erases WILLIAM A. BOHNE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO E. F. HOUGH- TON 6t COMPANY, OF PHILADELPHIA PENNSYLVANIA, A CORPORATION OLE" PENN- Serial No. 231,320.

SYLVANIA.

WASHER-SCRATCHING MACI'EINEQ Application filed November 5, 1927.

This invention relates to devices for scratching the surfaces of leather products, such as washers, in which it is desirable to obtain a rough finish for cementing or other purposes, and the principal object of the invention is to provide a machine that will be capable of effectively performing this operation on the relatively small and detached pieces.

Another and more specific object of the 1nvention is to provide a machine which shall be more or less self-adjustable for articles of varying sizes.

The invention further resides in certain novel structural details and arrangements of parts hereinafter set forth and illustrated in the attached drawings, in which:

Figure 1 is side elevation of a machine made in accordance with my invention;

Fig. 2 is a plan view of the machine;

Fig. 3 is a front elevation of the machine, and

Fig. 4 is a longitudinal section showing the relative positions of the various rollers and associated elements.

lVith reference to the drawings, the machine comprises a main frame including uprights 1 and longitudinal side bars 2. Mount ed in journals 3 on the tops of the side bars 2' is a pair of smooth-faced rolls 4, 4, and a corresponding set of rolls 5, 5' is mounted in journals 6 depending from the under side of said bars. The latter rolls 5, 5 function as pulleys around which operates a belt 7 of peculiar construction, hereinafter described, and the shaft of one of the rolls 5 is extended as indicated at 8, Fig. 2, and carries at its outer end a wheel 9 by means of which this shaft and roll may be operatively connected through a suitable power belt with an external source of power (not shown).

The journals 3 of the rolls 4 are not fixed but are in each instance slidably held on upright pins or bolts 13, 13, and springs 14 on the outer ends-of these bolts are arranged to exerta pressure opposing elevation of the bearings which normally rest upon the tops of the frame side bars 2. It will be noted that the springs 14 are confined between the tops of the bearings 3 and nuts on the upper threaded ends of the pins 18, and by adjusting these nuts, the effective tension of the springs may be varied as desired.

Also journa-led on the frame, in fixed bearings 12, and intermediate the rolls 4, 4, is a rotary scraping or roughening. roll or brush 10, this brush being in the form of a cylinder having projecting from the surface thereof bristles in the form preferably of wire pins. These bristles may project radially from the surface of the roll. In the present instance, the surface is constituted by a relatively narrow band llspirally wound on the roll to form a substantially uniform bristled surface. The shaft 15 which supports the rotary brush 10 is extended at one side of the frame and carries a pulley 16'by means of which this shaft and the rotary brush may be operatively connected through a suitable power belt with an external source of power (not shown).

The belt 7 is composed of a plurality of relatively narrow longitudinal strips, from which wire pins or bristles project at an acute angle to the belt surface, but in parallel planes longitudinally of the belt, these strips being relatively so arranged that the pins on adj acent strips project from the belt in opposite directions. This belt may have the general physical characteristics of a carding clot-h.

Between the rolls 5, 5 around which the belt operates is a tensioning roll 17, this roll being. mounted in bearings 18 resiliently supportedby springs 19, which latter are held on the lower ends of pins 20 on which the said bearings slide. Nuts 21 on the lower ends of the bolts 20 provide for adjusting the spring tention, and adjustable stop screws 23 which engage the under sides of the frame bars 2, as shown in Fig. 1, determine the normal position of the upper run of the belt with respect to the roughening roll 10. It will be noted that by reason of the resilient mounting of the rolls 4 and 17, the machine isself-adjustable for articles of different thicknesses,

In the operation of this machine, the washers or other leather articles are fed to the upper run of the belt 7, waich may be operated in either direction, and are carried first beneath the near roller 4. This roller 4, which preferably is solid and may, for example, be of wood, acts to press the leather article down upon the pins of the belt 7 so that they penetrate the leather to some extent and take a good grip upon the articles. The angular setting of pins of the belt 7, as

described above, insures a firm carrying grip upon the leather article the opposed angularity of the different sets of pins tending to anchor the article on thebelt against move ment in either longitudinal direction.

T he article is then carried under the roll 10, which is rotated preferably in the same direction. as the belt but at a considerably higher rate of speed, the pins thoroughly scratching the upper surface of the leather with which they come in contact. The springs 19 of the tensioning roll 1'? ensure a proper and predetermined pressure between the roughening roll and the belt, and these springs also permit the relative movement necessary to con'ipensate for articles of different thicknesses. After the roughening operation, the articles pass under the further roll 4t and are dropped from the belt to a chute 22 secured on the frame opposite the end of the belt, which conducts them to a suitable receptacle.

Continuous operation of the conveyor belt 7 and. roughening roll 10 in one direction results in a bending over of the pins on the roll 10 to an angle which renders them relatively inell'ective. In order to increase the life of the roughening roll and to generally increase the cfliciency of the machine, I provide for its operation and that of the belt 7 in either direction so that the direction of operation may be periodically reversed, thereby to nrevent or correct the bending over of the roughening pins. This operation of the machine in both directions is made possible by the construction of the belt 7 as described with pins having opposite inclinations, and by employing two pressing rolls 4-, one on each side of the roughening roll which function as described above to press the leather article onto the pins of the belt 7 prior to their engagement with the rougln ening roll.

lVith regard to the rolls 4, it will be noted that these are located not directly above the rolls 5, but sufficiently close thereto to insure that the articles passing under the rolls 4: will be pre led firmly upon the pins of the belt 7. The flexibility of the beltassists the springs 14 in con'ipensating for the different thicknesses of the articles fed to the machine.

There may be considerable modification without departure from the essential. features of the invention, as set forth in the appended claims.

I claim:

1. In a machine for scratching the surfaces of leather washers, the combination with a conveyor including means for holding the washers against pressures longitudinally of the conveyor, of means operative to render said holding means effective, a roughening roller mounted above the conveyor in position to engage the washer as it advances with the conveyor, and means for actuating the conveyor and the roller.

2. In a machine for scratching the surfaces of leather washers, the combination with a conveyor including projecting pins for holding the washers in position thereon, of means operative to force the washers against the pins to render the latter effective, a roughening roller mounted above the conveyor in position to engage the washer as it advances with the conveyor, and means for actuating the conveyor and the roller.

3. In a machine for scratching he surfaces of leather washers, the combination with a conveyor including projecting pins for holding the washers in position thereon, of a roller mounted adjacent the conveyor to force the washers against the pins to render the latter effective, a roughening roller mounted above the conveyor in posit-ion to engage the washer as it advances with the conveyor, and means for actuating the conveyor and the roller.

4. In a machine for scratching the surfaces of leather washers, the combination with a conveyor including projecting pins for holding the washers in position thereon, said pins being inclined from the conveyor surface in the direction of movement thereof and being adapt-ed to anchor the washers on the conveyor, of a roughening roller mounted above the conveyor in position to engage the washer as it advances with the conveyor, and means for actuating the conveyor and the roller.

5. In a machine for scratching the surfaces of leather washers, the combination with a conveyor including projecting pins for holding the washers in position thereon, some of said pins being inclined from the conveyor surface toward the direction of movement thereof, and others being inclined in a direction opposite to said movement, and being adapted to anchor the washers on the conveyor, of a roughening roller mounted above the conveyor in position to engage the washer as it advances with the conveyor, and means for actuating the conveyor and the roller.

6. In a machine for scratching the surfaces of leather washers, the combination with a conveyor including projecting pins for holding the washers in position thereon, of a roughing roller mounted above the conveyor in position to engage the washer as it advances with the conveyor, said conveyor pins being inclined in a direction opposite to that in which the roller moves in that part adj acent the conveyer, and means for actuating the conveyor and the roller.

7. In a machine for scratching the surfaces of'leather washers, the combination with a conveyor including means for holding the washers thereon in predetern'iined position, of a roughing roller having pins projecting from the surface thereof and adapted to engage the washers as they advance on the conveyer, means for actuating the conveyor and the roughing roller, and means on both sides of said roughing roller operative to render the washer-holding means of the conveyer effective.

8. In a machine for scratching the surfaces of leather washers, he combination with a conveyer including washer-retaining pins projecting theref "om, some of said pins being inclined toward the direction of their movement with the conveyer and others being divergently inclined toward the opposite direction, of a roughing roller having pins projecting from the surface thereof and adapted to engage and roughen the surface of the washer as it advances on the conveyer, and rollers arranged on opposite sides of said roughing roller and functioning to press the washers downwardly on the holding pins of the conveyer prior to the engagement of the washer by the roughing roller thereby to render the pins more effective to retain the washers during the roughing operation.

9. In a machine for scratching the surfaces of leather washers, the combination with a conveyer having washer-retaining pins projecting therefrom, said pins being arranged in longitudinal sets with the pins of one set inclined toward the direction of their movement with the conveyer and with the pins of the immediately adjacent set or sets inclined toward the opposite direction of a roughing roller mounted above the conveyer and positioned to engage the washer as it advances with the conveyer, and means for actuating the conveyer and the roller.

10. In a machine for scratching the surfaces of leather washers, the con'ibination with a conveyer including washer-retaining pins projecting therefrom, some of said pins being inclined toward the direction of their movement with the conveyer and others being divergently inclined toward the opposite direction of a roughing roller having pins projecting from the surface thereof and adapted to engage and roughen the surface of the washer as it advances on the conveyer, rollers arranged on opposite sides of said rou hin roller and functionin to JIQSS the washers downwardly on the holding pins of the conveyer prior to the engagement of the washer by the roughing roller thereby to render the pins moreeflective to retain the washers during the roughing operation, and means including a resilient mounting of the pressing rollers for automatically adapting the machine to articles of different thicknesses.

WVILLIAM A. BOHNE. 

